Encountering an Uncaught TypeError message: Cannot read properties of undefined (reading '_ref').
While attempting to utilize code for displaying API content on a webpage, what might be causing this issue and how can it be resolved to successfully show the contents on the page?
const displayItems = (category: number) => {
return products.filter((item) => item.category._ref === categories[category]._id).map((item) => <Item item={item} key={item._id}/>);
};
An important clue has been revealed in the error message. It seems that at a certain point within the filter() function, the value of product.category is undefined. To investigate further, consider logging the product object at the start of the function to uncover the root cause.
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